High-speed printing-press.



M. ROCKSTROH. HIGH SPEED PRINTING PRESS.

APPLICATION FILED JAN-6.1913.

1,149,688. Patented Aug. 10, 1915.

4 SHEETK-SHEET 1.

M L \is l] IIIII/l/ll e Fig.5. Fig.5.

COLUMBIA PLANOURAPH cD., WASHINGTON, u. c.

M. ROCKSTROH.

HIGH SPEED PRINTING PRESS.

APPLICATION FILED JAN.6. 1913.

1,149,688. Patented Aug. 10; 1915.

Fig.7.

4 SHEETS-SHEET Z- COLUMBIA PLANUORAPH 60-, WASHINGTON. D. c.

M. ROCKSTROH.

HIGH SPEED PRINTING PRESS.

APPLICATION FILED IAN.6. I913.

1,149,688. Patented Aug. 10, 1915.

4 SHEETS-SHEET 3.

ccLuMIJIA PLANOGRAPII c0..wAsH|NGToN. D. c.

M. RDCKSTROH.

HIGH SPEED PRINTING PRESS.

APPLICATION FILED JAN.6, I913- 1,149,688, Patent-ed Aug. 10, 1915.

4 SHEETSSHEET 4.

COLUMBIA PLANouRAPl-l co., WASHINGTON, 04 c4 MAX nocns'raorr, or KLEIN SEIDLI'IZ, NEAR rrmimennnnny;

' HIGH- SPEED PRINTING-PRESS.

Specification of Letters Patent. Patented Aug 10, 1915;

Application filed January 6, 1913. Serial No. 740,513.

To all whom itmay concern:

Be it known that 1, MAX RooKs'rRoH,

manufacturer, subject or citizen of the Kingdom of Saxony, in the German Empire, residing at Villa Liitzow, Klein Sedlitz, near Pirna, Germany, have invented. certain new and useful Improvements in and Relating to High-Speed Printing-Presses, of which the following is a specification.

My invention relates to high speed printing presses.

In connection with high speed printing presses it is sometimes necessary, for exam ple in case of danger, to suddenly apply'the brake with the result that the whole of the mechanism, and particularly the driving gear, is subjected to a very great strain. The brakes hitherto employed only act on the driving gear generally on the fly wheel so that the carriage connected by a connecting rod to the crank shaft has the tendency to continue its movement, with full momentum, when the brake is applied. It is consequently essential with'modern high speed presses to destroy the momentum of all moving masses as elfectively as possible when the machine is thrown out of operation.

Accordingto the present invention I apply a brake to the reciprocating carriage simultaneously with the brake applied to'the fly wheel, so that the momentum of the carriage is directly checked. Various forms of braking devices may be usedfor this purpose. I may also apply a brake to the printing cylinder so that the cylinder will be stopped in any position when the machine is arbitrarily or automatically declutched. The braking device for the carriage and printing cylinder may be combined so that they operate collectively when the machine is arbitrarily or automatically declutched. The brake devices may be mechanically operated, or by hydraulic or electric power, or other means.

The invention is illustrated in the accompanying drawing in which, Figures 1 and 2 are a side elevation and section respectively of a printing press provided with means for braking the carriage. Figs. 3 to 5 are a cross section, longitudinal section and plan view respectively of the gear for actuating the brake shoes. Fig. 6 is a cross section of the brake shoes provided with springs for normally holding them out of action. Figs. 7 and 8 are a side and a front view respectively of a hydraulic brake for the carriage.

braked direct. 'rying this intoeifect is shown in Figs. 7 to 12. In this casefplungers a work in: cylinders y. and are adapted to bear against long brake'shoes 0, so that the latter are Figs. 9 to 11 are views to a larger scale of the hydraulic brake. Fig. 12 shows the brake controlling gear. F igsi13 to '15 show three positions of a brake for braking the printing cylinder.

Referring in the first place to F 1 to 16, the carriage a which rolls or slides backward and forward on its bed, is provided on both sides with guide bars 6 adaptedfto coact with brake shoes 0 the latterheing operated by rotation of cam shaft mounted in brackets 6 fixed on. both sides of the carriage bed. The shafts d are rotatcd' by the 'clutch gear by means of asystein of lever arms 1'', 9,10,.j, thelevers g' h and j being fixed to the shaft 71, a d the levers h a and 51' being connected bylinks to lever arms is and Z, fixed to the shafts a. The brake shoes are normally held out of engagement with the bars I) by means of. springs m, as shownin Fig. 6. v I 7 It will be seen that with the brake gear as shown in Figs. 1 to 6, the brake shoes acting on the carriage are controlled by mechanical means. I however, also be controlled by hydraulic power, or the carriage may be hydraulically ne fo m of gear for ca pressed against the bars 6- fixed to the carriage. The brake shoes are normally held clear of the bars '6 by springs g as shown in Fig. 11. The cylinders are connected with one another and with the source of fluid pressure by suitable piping, ports controlled by screws being provided for subsequent escape of the fluid. A plunger it inside the pressure generator t is actuated by a bellcrank 12 and spring w, the latter being in tension in Fig, l2. s

Mechanism for braking a printing cylinderis shown in Figs. 13, H and 1.5,,Fig. 13 showing a fly wheel'brake in combination with the printing cylinder brake, both brakes out of action; Fig. 14 shows the brakes in operation. Fig. 15 is a side View showing the fly wheel and printing cylinder brakes put out of operation by hand, in order to enable the machine to be turned by hand without operating the clutch-shaft.

Fixed to the clutch shaft 1 is a brake cam 2, onwhich bearsan adjustable screw fixed to a lever 3, the latter being pivoted T e. b ake hoe may to a brake lever 4c. The lever 4: is pivoted to the bed-frame 5, and operates a hand brake 6, which acts on the shaft of the fly' wheel. To the lever 3 is connected a link 7 which is pivoted to a bell-crank 8 having its fulcrum on the bed frame 5. The bellcrank 8 carries at the end of one arm an adjustable screw 9 which is adapted to bear against the head ofa kind of cam lever 10 pivoted toone arm of a double armed lever :11 which is pivoted to the bed frame; the

other arm of said lever 11 works in a guide 12 which is fixed to a rod 13. The latter is connected to a lever 14 which actuates the descends, on the head of the lever 10 and 'rfocks the double armed lever 11, so that the other end of the latter raises the rod 13 and actuates the band brake 15 of the printing cylinder 16.

If it is desired to turn the fly wheel by hand the brakes are released by lifting the lever 3 by hand as shown in Fig. 15 where by the screw thereon is lifted clear of the cam 2 and the screw 9 is also lifted clear of the lever 10, so that both brakes are disengaged. When the machine is clutched fagain, the brake releasing lever 3 drops back I'to its'original position and the bell crank .Sjalso returns toits original position, the lever 10 swinging about its pivot, so that the parts resume the position shown in Fig.

13'without the brake being applied to the printing cylinder. It will be seen that with :e'ngaged while the machine is unclutched I and automatically returns to its normal inoperative position when the machine is 'electric brakes may be used in connection h w th mechamsm such as shown in Figs. 13

clutched again. Hydraulic, pneumatic or to 15 for controlling the brakes. It is generally of advantage to combine braking devices for the carriage, cylinder and fly wheel or other part of the. actuating mechanism, so that they operate collectively when the machine is declutched automatically or by hand.

Having now particularly described and ascertained the nature of my said invention and in what, manner the same is to beperforined, I declare that what I claim is 1. In braking devices for printing presses of the character described, in combination with the reciprocating table of the press, a guide strip carried by said table, a series of brake shoes disposed along the path of said guide strip, and means for operating said brake shoes simultaneously, substantially as described.

2. In braking devices for printing presses of the character described, in combination with the reciprocating table of the press, a

guide strip carried by said table, a series of brake shoes disposed along the path of said guide strip, and means for operating said brake shoe simultaneously, including a cam shaft provided with a series of cams, each adapted to actuate a specific brake shoe, substantially as described.

I 3. A braking device for printing presses of the character described comprising. in combination, a plurality of brakes, a rotatable rod, a cam on said rod, means for actuating said rod, a brake lever controlling one of said brakes, a bell crank lever pivoted to the brake lever and having one arm engaging said cam, a second brake lever for the second brake, a lever having operative connection with the second brake lever, a second bell crank lever pivoted to swing into and out of engagement with the last mentioned lever, and a link connecting said bell crank levers whereby movement of the first bell crank lever controls the'movement of the second bell crank lever.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

7 MAX ROCKSTROH.

Witnesses:

' PAUL ABRAS,

CLARE SIMON.

Ga ilee of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

